Fix approx blockchain height calculation

src/wallet/wallet2.cpp

@@ -12989,16 +12989,15 @@ uint64_t wallet2::get_daemon_blockchain_target_height(string &err)
 uint64_t wallet2::get_approximate_blockchain_height() const
 {
   // time of v2 fork
-  const time_t fork_time = m_nettype == TESTNET ? 1448285909 : m_nettype == STAGENET ? 1520937818 : 1458748658;
+  const time_t fork_time = 1707681224;
   // v2 fork block
-  const uint64_t fork_block = m_nettype == TESTNET ? 624634 : m_nettype == STAGENET ? 32000 : 1009827;
+  const uint64_t fork_block = 1024;
   // avg seconds per block
   const int seconds_per_block = DIFFICULTY_TARGET;
   // Calculated blockchain height
   uint64_t approx_blockchain_height = fork_block + (time(NULL) - fork_time)/seconds_per_block;
-  // testnet and stagenet got some huge rollbacks, so the estimation is way off
-  static const uint64_t approximate_rolled_back_blocks = m_nettype == TESTNET ? 342100 : 30000;
-  if ((m_nettype == TESTNET || m_nettype == STAGENET) && approx_blockchain_height > approximate_rolled_back_blocks)
+  static const uint64_t approximate_rolled_back_blocks = 1440; // 1 day rollback
+  if (approx_blockchain_height > approximate_rolled_back_blocks)
     approx_blockchain_height -= approximate_rolled_back_blocks;
   LOG_PRINT_L2("Calculated blockchain height: " << approx_blockchain_height);
   return approx_blockchain_height;